#header {
    height: 80px;
    width: 100%;
    position: fixed;
    background: rgb(230, 200, 200);
    z-index: 100;
}

#logo {
    margin-left: 35%;
    line-height: 80px;
    font-family: 楷体, serif;
    font-size: 40px;
}

#nav {
    float: right;
    margin-right: 20%;
}

#nav li {
    width: auto;
    float: left;
    margin-left: 30px;
    line-height: 80px;
}

#nav li > a {
    padding: 5px 10px;
}

#nav li :hover {
    background: gray;
    border-radius: 10px;
}


#container {
    width: 100%;
    height: 900px;
}

.main_a {
    background: rgb(230, 200, 200);
    border-radius: 20px;
    font-size: 30px;
    position: absolute;
    right: 300px;
    bottom: 300px;
    padding: 10px 50px;
}

.main_b {
    right: 600px;
}


#sec {
    margin: -150px auto 0;
    border-radius: 50px;
    width: 90%;
    height: 800px;
    background: white;
}

.swiper-container {
    width: 100%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
}

.swiper-slide {
    text-align: center;
    font-size: 18px;
    background: #fff;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
}

#container_thr h1 {
    font-family: 楷体, serif;
    margin-left: 80px;
}


#footer {
    height: 100px;
    width: 100%;
    background: rgb(80, 80, 80);
}